Improved grinding-mill



W. PEGK. GRINDING MILL No. 102,588. :Patented May 3, 1870..

'UNITED STATES.

`Partnr' OFFICE.

WALTER P noK, oF RocKFoItn, ILLINOIS.

`HVIFROVED GRlNDlNG-MILL.

To all whom, it may concern:

Bc it known that I, WALTER PEOK, of Rockford,l in the county of lVinnebago and State of Illinois, have invented new and useful Improvements in Grindinglllills; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the. letters of reference marked thereon.

This invention relates to an improved method of grinding corn or other grain, whereby two vertical circular grinding -surfaces are employed, one being stationary and the other having a vibratory motion, to which end certain details of construction are employed, which will hereinafter more fully appear.

In the drawings, Figure 1 is a side elevation of my invention; Fig. 2, a plan view of the same; Fig. 3, a longitudinal central section through the line x x, Fig. 2; and Fig. 4, aside elevation of the stationary plate, the Vibrating plate being removed. A

To enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

A A represent circular metal plates of any suitable diameter, the plate A being bolted by the ears a a, Src., to any convenient surface, and rigidly attached to theshaft a. 'To the inner side of the plate A is attached an annular plate, B, of hardened metal or other convenient material, having its upper portion cut away to form a channel, B', for the admission of grain.

b represents a series of radial grooves cut in the outer part of the inner surface of the 'plate B, and extending a little over one-half the distance across the same, where they are -inet by a series of tangential grooves, b2, of greater depth than the former, which conduct the grain from the circular chamber b to the grindinglsurfaces. The grooves 112 are formed with one side beveling, and the other nearly at an angle with the surface of the plate, thereby forming sharp cuttingfedg'es. About one-third of the grooves b2 are cut deeper than the rest, in order to admit the grain more freely to the cutters and preventy the same from clogging.` It will also be observed that the grooves b and b2 have their cutting-edges in y reversed positions, so that at each movement of the lever the grain is cut. The arrangement ofthe angles is such, also, that when the grain is being A cut with one set of edges the grain in the other is loosened up for the next cutting. These plates may be made in any desired form.

C @represent projections ou the inner edge ofthe plate B,.i`or the purpose of breaking cobs or other obstructions which may get between the plates. i

C represents the hopper, which is secured to the plate A and communicates with the passage B. The plate A has acorresponding angular plate, B2, attached thereto, which is similar in construction to the plate B, except that its' continuity 'is unbroken.

c"- represents a cylindrical case, through Vwhich the shaft a passes.

c2 is a hand-wheel provided with a screw, c3, which engages with a corresponding screwthread, c4, in the end of the shaft a. The screw c1 is provided with an annular grooved flange, D.

D represents a collar, which surrounds the sc rew '03, and is provided'with the set-screw d, by means of which it is held securely on the shaft a,.and with twoY clasps, d d', whose ends are bent at right angles and engage the grooved ange D and an annular groove, d, on the end of the ease c. The object of this latter arrangement is to eiiiciently regulate the distance between the grinding-plates, which is also eiected by the screws d* da.

E represents a lever attached to the plate A', bymeans of which vibrating motion is iinparted to the plate A. The lever E may be operated byhand or other power; being es pecially adapted to mechanism where a crank is employed, asin windmills, for which attachment a staple or ring, e, is employed, which may be adjusted longitudinally at any desired point to regulate the length of stroke.

The operation of my invention is as follows: The grain is placed in any convenient receptacle above the hopper, and conducted thereto by a tube or spout, whence it passes down through the channel B', thence through the tangential grooves bZ to the grindingplates, and by its own gravity passes downward,'and when ground suiiciently'ne falls into a re,- ceptacle below. The distance between the cutting-plates is efficiently regulated by the handwheel c and screws c3 and c4, which, when turned up, force the plate A into closer proxare the same.

ing-surface equidistant from the other. When desired to'con'ne the plate in any position, and prevent accidental working of the-handwheel, the set-screw d is operated, which presses firmly on the shaft a and holds the same securely. The grinding-plates may be n made of any suitable material-as white metal,

hardened-like steel-and lcan be -readily removed when worn 01T; or, if desired small burr- 4stones maybe used instead. In either case the general forni and method of attachment This arrangement is one requiring but little power to operate it, and, as above mentioned, is especially adaptedto windmills. Having no liability to clog', it can be pnt in operation by avery slight breeze, and

by the formation of its grinding-surfaces can be Worked equally'well by an upward or down` Ward motion of the lever.

I Having thus fully described my invention, what I claim as new,and desirc'to secure by Letters Patent, is

1. The grindingmlachine above described, consisting substantially of -the plates A A', grinding-plates B B2, shaft a', case c', lever E, hand-wheel o2, with screw Ac3, collar d, clasps d d', and grooves D d2, arranged and operated substantially as described. j

2.v The combination of the plates A A', provided With the grooves b b2, with reversed cnttin g-e'dges, when arranged and operating as described, for the purposeset forth.4

This specification signed and witnessed this 3d lday of February, 1869.

A WALTER PECK. Witnesses: 4

' G. W. FORD,

F. L. BLACKMAN. 

